Holding device for vibrators



March 19, 1963 3 Sheets-Sheet 1 Filed July 1, 1958 m m T'J H. K N a Q- \N N N9. 3 c Q; a m. w m 2 cu a .1 TUE o 8 w 1 8 3 .L S m mm mu R R "mm mm m KD m w K H March 19, 1963 3 Sheets-Sheet 2 Filed. July 1, 1958 Karl Ax} Sam Karlstrom March 1963 K. A. s. KARLSTROM ET AL 3,081,980

HOLDING DEVICE FOR VIBRATORS Filed July 1, 1958 s Sheets-Sheet s United States Patent 3,081,980 HOLDING DEVICE FOR VIBRATORS Karl Axel Sam Karlstriim, Gavle, and Karl Gustaf 0stberg, Rotebro, Sweden; Ingrid J. C. Allard and Elsie A. M. Ostberg, heirs of said Karl G. Ostberg, deceased Filed July 1, 1958, Ser. No. 746,045 Claims priority, application Sweden June 5, 1958 9 Claims. (Cl. 259-72) The present invention relates to a holding device for such vibrators, especially for dental use, in which the vibrations are generated by a roller body enclosed in a tube. The roller body is driven by a shaft introduced into the posterior end of the tube to vibrate a vibrator head disposed in the front end of the tube and a material container, for instance aring-shaped impression band for producing amalgam dies, disposed on the head. The object of the invention is to provide a carrying member for the vibrator and the container disposed on the vibrator head, said carrying member permitting the vibrator and the container to be resiliently secured and to damp simultaneously the vibration to the least possible degree. The invention is chiefly characterized in that the vibrator tube is attached with its posterior end to a holder in the shape of a block, preferably parallelepipedal, made of a resilient material, suitably rubber, in such a way that the vibrator may produce, as a result of the springiness of the block, an oscillating movement about the point of attachment. A suitable way of securing the vibrator in the block is to dispose the same in a bore of the block, the bore having a slightly smaller diameter than the vibrator tube, so that the tube is retained by means of a frictional engagement, the block being provided with an open slot extending along the bore which may be widened by bending the block longitudinally along the slot in order for the vibrator to be inserted and released. The container for the material to be vibrated is suitably disposed in a mount formed in the block. The mount encloses the container from the sides, and is secured therein 4 by the vibrator being pushed into the bore.

The invention will be described in greater detail with reference to the attached drawings. FIG. 1 is a longitudinal section, and FIG. 2 is a plan view of the vibrator. FIG. 3 shows the vibrator as seen from its front end. FIGS. 4 and 5 show the holder device in perspective in various positions. FIG. 6 ShOWs the holder block as seen from the front and FIG. 7 shows the same as seen from the top. FIG. 8 is a cross section through the central plane of the block. FIG. 9 shows the block as seen from below and FIG. 10 shows the same as seen from the side.

material. The front end of the tube is pressed or shrunk onto the cylindrical end of a vibrator head 2 which carries the article to be vibrated. The head 2 is bevelled along four planes 3, 4, 5, 6, of which the end plane 3 forms an inclined angle with the longitudinal axis of the vibrator, whereas the plane 6 is perpendicular to this last mentioned plane, and the side planes 4, 5 are positioned symmetrically on either side of a diametrical plane parallel to the longitudinal axis of the vibrator.

The inner end of the vibrator head 2 is shaped as a cylindrical stud 7, which forms a roller way for the roller body 9 disposed on the pendulum rod 8. The stud 7 projects into a bore 10 in the roller body, whose diameter is somewhat larger than that of the stud and whose cylindrical inner face forms the roller way cooperating with the stud 7. In order to reduce the weight of the pendulum rod proper and to impart simultaneously the necessary rigidity, the rod is shaped as thin- 3,081,980 Patented Mar. 19, 1963 walled tube. The inner end of this tube is formed as a seat for a resilient coupling member 11, by means of which the pendulum rod is connected to the driving shaft 12, and which consists of a cylindrical socket of rubber, plastic or such resilient material, the socket being interposed between two support flanges 13, 14 on the pendulum rod. The coupling portion associated with the shaft 12 consists of a cylindrical sleeve 15 which projects over the coupling member 11 on the pendulum rod and the associated flanges 13, 14, the socket 11 being compressed between said sleeve 15 and the pendulum rod so as to be held into frictional engagement with these two parts by the pressure generated at the compression. The flanges 13, 14 have a smaller diameter than the inner periphery of the sleeve 15 so that the pendulum can perform its oscillating movement in relation to the driving shaft 12 without said flanges contacting the sleeve 15. The oscillating is produced by the resilient socket 11 being deformed as it maintains a firm frictional engagement with the sleeve 15 so that the position of the centre of oscillation remains substantially unchanged after the sleeve 15 and the driving shaft 12 have been properly mounted inside the tube. The shaft 12 is journalled in a cylindrical plug 16 which may be inserted into the tube 1, said plug being nonrotatably connected with the tube 1 by means of a pin 17 fixed in the plug. The pin 17 projects through a longitudinal slot 18 in the tube 1 and is accessible from the outside so that the plug 16 together with the pendulum and the driving shaft 12 may be withdrawn from the tube 1 by removing the pin 17 when necessary for inspection or for replacing the pendulum.

The driving shaft 12 is to be connected to a motor driven shaft, not shown, by means of a snap coupling one part 19 of which is aflixed to the end of the shaft 12. Upon inserting the flexible shaft with its coupling part through the posterior end of the tube 1, a hook associated with the flexible shaft will engage, in known manner, a notch 20 in the tube 1 so that the coupling parts are held together. The plug 16 is fixed simultaneously in its proper position as the pin 17 then abuts the end of the slot 18.

As seen in FIG. 1 the vibrator head 2 is provided with two drilled holes 21, 22 perpendicular to one another, which are disposed in an axial symmetrical plane through the vibrator and which, in using the vibrator for works within the oral cavity, form holders for a tool, for instance a spatula, chisel or the like. In the present case one 22 of these holes are used as a holder for a pin 23 whose top end 24 is flattened and bent backwards so as to support, in a manner to be explained in greater detail, la; riig-shaped impression band resting upon the vibrator The roller body 9 may possibly be adapted to roll against the inside of the tube 1, in which case the head 2 with the stud 7 may be eliminated and the tube 1 extended so that the pin 23 may be inserted into holes in the end of the tube. Hereby a higher vibrating frequency and power may be attained.

The vibrator is intended to be mounted in a block 26, in a manner shown in FIGS. 4 and 5, the block preferably being made of rubber. As may be seen from FIGS. 6-10, the block has a parallelepipedal shape. It is provided with a bore 27, which passes through the whole block and is parallel to the largest sides of the block. A longitudinal rear section 28 of the bore has a slightly smaller diameter than the vibrator tube, while a front portion 29 has a larger diameter than the vibrator tube. The block is provided with a slot 30 extending along the rear part and a part of the front part of the bore, connecting it with the top of the block. The front end of the bore terminates in a triangular groove '31 provided in the front edge of the block. The groove receives the material container which in this case consists of an impression band 25. The bottom of the block is recessed on the surface portions denoted 32 and 33 on either side of the slot 30 so that the lateral edges 34, 34 of these surface portions will lie a few millimetres above the flat underside of the block, the latter normally engaging the base along a T-shaped surface, as shown in FIG. 9.

FIG. shows how the vibrator 1 is introduced into the bore 27. By exerting a pressure upon the block on either side of the slot 30, the slot and the narrower portion of the bore are widened so that the vibrator may be readily inserted to the desired position with the vibrator head 2 projecting from the block at the opposite end of the bore. Thereupon the block is turned to the position shown in FIG. 4. After the impression band 25 has been disposed in the triangular groove so that it bears with its lower edge against the vibrator head, the slot and the narrower portion of the bore are widened by the corner portions on either side of the slot being pressed down, after which the vibrator is pushed in so far that the shoulder member 24 of the pin inserted into the vibrator head is pressed against the impression band, thereby clamping the hand between the opposite side faces of the groove. Simultaneously a light downward pressure is exerted upon the vibrator head so the vibrator will assume a downwardly inclined position. Releasing the pressure upon the block the bore closes up about the vibrator tube holding the same in a firm frictional grip, the vibrator being centered by the bore and the vibrator head being raised together with the impression band. The friction between the band and the side faces of the groove presses the band into firm abutment against the vibrator head during the vibration. The side faces of the groove suitably form an angle of about 60. Between the end of the slot 30 and the groove 31 the bore is bridged by a portion 36 which offers suflicient strength to the wall sections of the groove.

As shown in FIG. 4 the impression band 25 is provided with a collar 37, for instance consisting of a piece of adhesive tape which is wound round the band and by means of which the band may be given a suitable, desired height. After the vibrating has been completed, the vibrator is released by the two posterior corners of the block being pressed down, after which the impression band is released by the vibrator being pulled out.

The frictional engagement in which the vibrator tube is held in the bore 27 is normally sufficient to prevent the tube from being rotated in the bore. In using higher vibrating power, however, it may be necessary to strengthen the frictional engagement by means ofspecial devices suitable for the purpose. For instance, the block may be pressed together by means of a spring clip which is arranged across the block so that it exerts a pressure upon the opposite side faces of the block.

What is claimed is:

1. A vibrator mounting assembly comprising a vibrator consisting of a tube, a vibratory head disposed in the fore end of the tube, a rotary shaft inserted in the rear end of the tube, and a roller-body enclosed in the tube and rotated by said shaft to produce a vibrating movement of said vibratory head, a holder for the vibrator comprising a block-shaped body of a resilient material defining a base portion for allowing the body to be placed on a horizontal surface and 'having a recess in which the vibrator tube is inserted and held by its rear end so as to project sideways through said body, the front end of said vibrator tube being free to vibrate in said body, and means for mounting a container in said body including means for clamping the container into vibratory contact with the vibrator.

2. A device according to claim 1, characterized in that the vibrator is inserted into a bore in the block, which bore has a slightly smaller diameter than the vibrator tube, the block being provided with an open slot extending along the bore, which slot may be widened by the block being bent in order for the vibrator to be inserted and released.

3. A device according to claim 1, characterized in that the underside of the block is recessed on both sides and adjacent an end of said horizontal slot whereby said slot may be widened by a pressure being exerted upon the block from the top.

4. A device according to claim 3, characterized in that the slot terminates in the top side of the block and only extends across a part of the bore passing through the block, the underside of the block being obliquely bevelled on either side of the bore so that the slot may be widened by a pressure being exerted from the top on either side of the slot.

5. A device according to claim 4, characterized in that the bore closely encircles and holds fast the posterior end of the vibrator and loosely encircles the front end of the vibrator.

6. A device according to claim 1, characterized in that the block is provided with a mount for the material container, said mount being formed in the resilient material and clasping the container from the sides, and a device for clamping the container in the mount.

7. A device according to claim 6, characterized in that the mount comprises a triangular groove disposed in the front edge of the block right in front of the bore, into which groove the container is clamped in a position firmly abutting the vibrator head, so that the container is set up against the resilient side walls of the groove.

8. A device according to claim 7, characterized in that the container is held fast and clamped in the groove by means of the vibrator which is provided for this purpose with a shoulder which, when the vibrator is pushed into the bore, is brought to engagement with the container under a resilient pressure.

9. A device according to claim 8, characterized in that the shoulder acting upon the container comprises a pin, detachably inserted into the vibrator head.

References Cited in the file of this patent UNITED STATES PATENTS 2,376,221 Baker May 15, 1945 2,422,639 Wenander June 17, 1947 2,649,286 Karlstrom Aug. 18, 1953 2,707,953 Ryan May 10, 1955 2,728,562 Bailey Dec. 27, 1955 2,730,902 Karlstrom Jan. 17, 1956 2,748,607 (arlstrom June 5, 1956 UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3,081 ,980 March 19, 1963 Karl Axel Sam Karl Karlstr'om et a1,

It is hereby certified that error appears in the above numbered pat ent requiring correction and that the said Letters Patent should read as corrected below.

In the grant, lines 1 to 3, for "Karl Axel Sam Karlstr'om, of Gavle, and Karl Gustaf Ostberg, of Rotebro, Sweden; Ingrid J. C. Allard and Elsie A. M. Ostberg, heirs of said Karl G. Ostberg, deceased," read Karl Axel Sam Karl str'om, of Gavle, and Karl Gustaf Ostberg, of Rotebro, Sweden; Ingrid J. C, A Allard and Elsie A. M. Ostberg, heirs of said Karl G. Ostberg,

deceased, assignors to said Karlstr'dm lines 12 and 13, for "Karl Axel Sam Kalrstrdm, Ingrid J. C. Allard, and Elsie A. M. Ostberg, their heirs" read Karl Axel Sam Karlstr'om, his heirs and in the heading to the printed specification lines 3 to 6, for "Karl'Axel Sam Karlstr'dm, Gavle, and Karl Gustaf Ostberg, Rotebro, Sweden; Ingrid Ja C. Allard and Elsie A. M. Ostberg, heirs of said Karl G. Os tberg, deceased" read Karl Axel Sam Karlstrdm, Gavle, and Karl Gustaf Ostberg, heirs of said Karl G Ostberg, deceased, assignors to said Karlstr'dm Signed and sealed this 8th day of October 1963.

(SEAL) Attest:

EDWIN L. REYNOLDS ERNEST W. SWIDER Attesting Officer Acting Commissioner of Patents 

1. A VIBRATOR MOUNTING ASSEMBLY COMPRISING A VIBRATOR CONSISTING OF A TUBE, A VIBRATORY HEAD DISPOSED IN THE FORE END OF THE TUBE, A ROTARY SHAFT INSERTED IN THE REAR END OF THE TUBE, AND A ROLLER-BODY ENCLOSED IN THE TUBE AND ROTATED BY SAID SHAFT TO PRODUCE A VIBRATING MOVEMENT OF SAID VIBRATORY HEAD, A HOLDER FOR THE VIBRATOR COMPRISING A BLOCK-SHAPED BODY OF A RESILIENT MATERIAL DEFINING A BASE PORTION FOR ALLOWING THE BODY TO BE PLACED ON A HORIZONTAL SURFACE AND HAVING A RECESS IN WHICH THE VIBRATOR TUBE IS INSERTED AND HELD BY ITS REAR END SO AS TO PROJECT SIDEWAYS THROUGH SAID BODY, THE FRONT END OF SAID VIBRATOR TUBE BEING FREE TO VIBRATE IN SAID BODY, AND MEANS FOR MOUNTING A CONTAINER IN SAID BODY INCLUDING MEANS FOR CLAMPING THE CONTAINER INTO VIBRATORY CONTACT WITH THE VIBRATOR. 